What are the biggest heavenly bodies in the solar system?
It depends on how you define "object". The Sun is the largest. Jupiter is the next biggest object in the solar system.Then again, if you want to get really technical, the largest thing in the solar system BY FAR would be Jupiter's magnetosphere, which extends a radius of several million miles and nearly reaches Saturn's orbit.If the Asteroid belt can be considered an object (even though it is comprised of millions or billions of individual 'things' - rocks - then that would be the largest thing in the solar system.